<!DOCTYPE html>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>
<p>PASS if no crash or assertion failure.</p>
<div style="columns:1; line-height:6px;">
    <div style="height:1px;"></div>
    <div style="columns:1;">
        <div style="height:6px; break-after:column;"></div>
        <div style="columns:1;">
            <div style="break-after:column;">
                <br>
            </div>
            <div style="columns:1;">
                <div style="break-after:column; columns:1;">
                    <br>
                    <br>
                    <br>
                </div>
            </div>
        </div>
    </div>
    <div style="height:1px;"></div>
</div>
